Idaho Code § 31-131
Latah county is described as follows: beginning at a point where the middle line of township thirty-seven (37) north intersects the boundary line between the state of Idaho and the state of Washington;
Western boundary. Thence north along the said boundary line to a point where the watershed between Hangman's creek and Palouse river crosses the said boundary line;
Northern boundary. Thence in a southeasterly direction along the said watershed to a point where this line crosses the section line between sections twenty-seven (27) and twenty-eight (28), township forty-three (43) north, range four (4) west; thence south on the said section line to the section corner common to sections twenty-seven (27), twenty-eight (28), thirty-three (33) and thirty-four (34), in the same township and range; thence east on this section line to the eastern boundary of the said township and range; thence north on the range line to the northwest corner of section thirty-one (31), township forty-three (43) north, range three (3) west; thence east along the section line running on the north of said section thirty-one (31), to the northeast corner of section thirty-three (33), township forty-three (43) north, range one (1) west; thence south one (1) mile, to the township line between townships forty-two (42) and forty-three (43) north; thence east along the said township line approximately 6 miles to the northeast corner of section four (4), township forty-two (42) north, range one (1) east, being the northeast corner of Latah county with Benewah county to the north and Shoshone county to the east;
Eastern boundary. Thence south along the section lines, approximately 2 miles to the southeast corner of section nine (9), township forty-two (42) north, range one (1) east;
Thence east along the section line, approximately 1 half mile to the north quarter corner of section fifteen (15), township forty-two (42) north, range one (1) east;
Thence south along the midsection line, approximately 2 miles to the south quarter corner of section twenty-two (22), township forty-two (42) north, range one (1) east;
Thence west along the section line, approximately 1 quarter mile to the west sixteenth corner of sections twenty-two (22) and twenty-seven (27), township forty-two (42) north, range one (1) east;
Thence west along the section line, 90 feet to a duly surveyed property corner monument;
Thence south along the property line, approximately 1 half mile to a duly surveyed property corner monument;
Thence east along the section subdivision line, 90 feet to the center west sixteenth corner of section twenty-seven (27);
Thence south along sixteenth section subdivision lines, approximately 1 and 1 half miles to the west sixteenth corner of sections thirty-four (34) and three (3), township forty-two (42) north and township forty-one (41) north, range one (1) east;
Thence east along the township line, approximately 1 quarter mile to the north quarter corner of section three (3), township forty-one (41) north, range one (1) east, being the northwest corner of Clearwater county with Shoshone county to the north and Latah county to the west;
Thence south along midsection lines, approximately 6 miles to the south quarter corner of section thirty-four (34), township forty-one (41) north, range one (1) east;
Thence west along the township line, approximately 22.8 chains (1,505 feet) to the west sixteenth corner of section three (3), township forty (40) north, range one (1) east;
Thence south along sixteenth section subdivision lines, approximately 1 mile to the west sixteenth corner of sections three (3) and ten (10), township forty (40) north, range one (1) east;
Thence west along the section line, 90 feet to a duly surveyed property corner monument;
Thence south along the property line, approximately 1 quarter mile to a duly surveyed property corner monument;
Thence east along the section subdivision line, 90 feet to the northwest sixteenth corner of section ten (10), township forty (40) north, range one (1) east;
Thence south along sixteenth section subdivision lines, approximately 4 and 3 quarter miles to the west sixteenth corner of sections thirty-four (34) and three (3), townships forty (40) north and thirty-nine (39) north, range one (1) east;
Thence west along the township line, approximately 90 feet to an unmonumented property corner;
Thence south approximately 1 half mile to a duly surveyed property corner monument;
Thence south approximately 1 half mile to a duly surveyed property corner on the south line of section three (3), township thirty-nine (39), range one (1) east;
Thence west along the section line approximately 1230 feet to the northeast corner of section nine (9), township thirty-nine (39) north, range one (1) east;
Thence south along section lines, approximately 5 miles to the southeast corner of section thirty-three (33), township thirty-nine (39) north, range one (1) east;
Thence east along the township line, approximately 5.83 chains (385 feet) to the northeast corner of section four (4), township thirty-eight (38) north, range one (1) east;
Thence south along section lines, approximately 3 miles to the middle line of the township, and the southeast corner of section sixteen (16), township thirty-eight (38) north, range one (1) east, being the southeast corner of Latah county with Clearwater county to the east and south;
Southern boundary. Thence west on the middle line of township thirty-eight (38) north to the point of intersection of said middle line and the center of Big Potlatch creek; thence along the average center of said creek south 41°29'00" west 433.17 feet; thence south 83°01'30" west 555.76 feet; thence north 72°43'45" west 486.51 feet; thence north 41°28'30" west 762.95 feet; thence north 72°52'00" west 134.45 feet; to a point which is north 358.29 feet from the corner common to Sections 16, 17, 20 and 21, township thirty-eight (38) north, range 2 west, Boise Meridian; thence north 72°52'00" west 2007.63 feet; thence south 48°22'30" west 949.70 feet; thence north 88º25'15" west 1485.48 feet; thence south 45°57'45" west 770.90 feet; thence north 82°46'15" west 750.35 feet; thence south 43°28'45" west 1160.84 feet; thence south 65°32'00" west 804.18 feet; thence south 46°29'30" west 527.72 feet; thence south 53°01'15" west 717.00 feet; to a point which is south 2073.86 feet from the one-quarter corner common to Sections 18 and 19 township thirty-eight (38) north, range 2 west, Boise Meridian; thence south 53°01'15" west 685.19 feet; thence south 30°54'30" west 1373.34 feet; thence south 84°44'45" west 1151.76 feet; thence south 21°04'00" east 1132.26 feet; thence south 05°04'00" west 902.41 feet; thence south 78°56'15" west 493.86 feet; to a point which is south 657.49 feet from the corner common to Sections 24, 19, 31 and 25, township thirty-eight (38) north, range 3 west and range 2 west, Boise Meridian; thence south 78°56'15" west 136.97 feet; thence north 87°54'15" west 2370.65 feet; thence south 73°27'15" west 1216.03 feet; thence south 34°56'45" west 2443.32 feet; thence south 55°35'15" west 258.89 feet; to a point which is south 447.50 feet from the one-quarter corner common to Sections 26 and 25, township thirty-eight (38) north, range 3 west, Boise Meridian; thence south 55°35'15" west 2071.08 feet; thence south 42°55'30" west 1609.29 feet; to a point which is located west 2811.85 feet from the corner common to Sections 26, 25, 36 and 35, township thirty-eight (38) north, range 3 west, Boise Meridian; thence south 44°33'29" west 950.95 feet; thence south 07°36'44" west 869.85 feet; thence south 28°34'42" west 740.46 feet; thence south 30°26'40" west 397.99 feet; thence south 03°38'57" west 618.32 feet; thence south 38°21'12" west 690.57 feet; thence south 54°22'07" west 56.90 feet; thence south 69°39'54" west 343.03 feet; thence south 82°19'22" west 333.65 feet; thence south 65°55'57" west 647.97 feet; thence south 63°14'18" west 784.25 feet; thence north 85°46'49" west 1140.68 feet; thence south 37°18'55" west 820.62 feet; thence south 30°42'01" west 840.83 feet; thence south 02°55'30" east 1395.50 feet; thence south 10°47'35" west 233.84 feet; thence south 52°26'42" west 474.82 feet; thence south 31°23'33" west 1307.49 feet; thence south 15°45'00" west 732.84 feet; thence south 10°27'38" east 755.37 feet; to a point which is east 662.51 feet and north 02°06'09" west 8.57 feet from the corner common to Sections 3, 4, 9 and 10, township thirty-seven (37) north, range 3 west, Boise Meridian, which corner is marked by a Brass Cap Monument set 1556.70 feet east of said corner set by James W. Grow, R.L.S. #749; thence south 02°06'09" east 317.10 feet; thence south 11°10'52" west 528.81 feet; thence south 33°23'33" west 1343.54 feet; thence south 18°47'37" east 514.74 feet; thence south 18°33'57" west 902.43 feet; thence south 10°36'14" west 654.11 feet; thence south 21°02'12" west 343.00 feet; thence south 31°52'33" west 896.41 feet; to a point that is west 983.97 feet and north 05°04'43" east 80.67 feet from the corner common to Sections 9, 10, 15 and 16, township thirty-seven (37) north, range 3 west, Boise Meridian, being marked by a 5/8" iron pin set in a mound of stone by James W. Grow, R.L.S. #749, and by a Brass Cap Monument set 1136.66 feet west of said section corner; thence south 05°04'43" west 488.49 feet; thence south 15°20'14" west 272.28 feet; thence south 27°52'57" west 661.93 feet; thence south 57°36'12" west 456.93 feet; thence south 21°50'14" west 385.38 feet; thence south 12°45'28" east 367.96 feet; thence south 67°00'39" east 464.34 feet; thence south 22°07'05" west 1097.33 feet; thence south 33°13'49" west 576.62 feet; thence south 13°03'47" east 296.08 feet; thence south 34°16'41" west 1198.35 feet; thence south 21°36'07" west 183.18 feet; to a point on the north line of Section 21, township thirty-seven (37) north, range 3 west, Boise Meridian, said point being east 1482.32 feet from the northwest corner of said Section 21, which corner is marked by a Brass Cap Monument lying east 1845.18 feet from said corner; thence west along the middle line of township thirty-seven (37) north to the point of beginning.
County seat-Moscow.
Idaho Code § 31-131